package com.tjy.framework.web.service;

import javax.annotation.Resource;

import com.tjy.common.core.domain.AjaxResult;
import com.tjy.common.core.domain.entity.SysUser;
import com.tjy.common.enums.UserStatus;
import com.tjy.common.utils.PhoneUtils;
import com.tjy.farmer.domain.FarmerLocationInfo;
import com.tjy.farmer.mapper.FarmerLocationInfoMapper;
import com.tjy.farmer.service.IFarmerLocationInfoService;
import org.apache.commons.lang3.RandomStringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Component;
import com.tjy.common.constant.CacheConstants;
import com.tjy.common.constant.Constants;
import com.tjy.common.constant.UserConstants;
import com.tjy.common.core.domain.model.LoginUser;
import com.tjy.common.core.redis.RedisCache;
import com.tjy.common.exception.ServiceException;
import com.tjy.common.exception.user.BlackListException;
import com.tjy.common.exception.user.CaptchaException;
import com.tjy.common.exception.user.CaptchaExpireException;
import com.tjy.common.exception.user.UserNotExistsException;
import com.tjy.common.exception.user.UserPasswordNotMatchException;
import com.tjy.common.utils.DateUtils;
import com.tjy.common.utils.MessageUtils;
import com.tjy.common.utils.StringUtils;
import com.tjy.common.utils.ip.IpUtils;
import com.tjy.framework.manager.AsyncManager;
import com.tjy.framework.manager.factory.AsyncFactory;
import com.tjy.framework.security.context.AuthenticationContextHolder;
import com.tjy.system.service.ISysConfigService;
import com.tjy.system.service.ISysUserService;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.math.BigDecimal;

/**
 * 登录校验方法
 *
 * @author tjy
 */
@Component
public class SysLoginService {
    @Autowired
    private TokenService tokenService;

    @Resource
    private AuthenticationManager authenticationManager;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysUserService userService;

    @Autowired
    private ISysConfigService configService;

    @Autowired
    private SysPermissionService permissionService;

    @Autowired
    private FarmerLocationInfoMapper farmerLocationInfoMapper;

    /**
     * 登录验证
     *
     * @param username 用户名
     * @param password 密码
     * @param code 验证码
     * @param uuid 唯一标识
     * @return 结果
     */
    public String login(String username, String password, String code
            , String uuid, String phoneNum, BigDecimal longitude, BigDecimal latitude) {
        // 验证码校验
        validateCaptcha(username, code, uuid);
        // 登录前置校验
        loginPreCheck(username, password);
        // 用户验证
        Authentication authentication = null;
        try {
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);
            AuthenticationContextHolder.setContext(authenticationToken);
            // 该方法会去调用UserDetailsServiceImpl.loadUserByUsername 密码校验
            authentication = authenticationManager.authenticate(authenticationToken);
        } catch (Exception e) {
            if (e instanceof BadCredentialsException) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
                throw new UserPasswordNotMatchException();
            } else {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
                throw new ServiceException(e.getMessage());
            }
        } finally {
            AuthenticationContextHolder.clearContext();
        }
        // 1. 异步执行：记录登录信息
        AsyncManager.me().execute(
                AsyncFactory.recordLogininfor(
                        username,
                        Constants.LOGIN_SUCCESS,
                        MessageUtils.message("user.login.success")
                )
        );

        LoginUser loginUser = (LoginUser) authentication.getPrincipal();
        SysUser user = loginUser.getUser();

        // 2.保存更新用户的地理位置
        FarmerLocationInfo farmerLocationInfo = new FarmerLocationInfo();
        farmerLocationInfo.setFarmerId(user.getFarmerId());
        farmerLocationInfo.setLocationTime(DateUtils.getNowDate());
        // 经纬度
        farmerLocationInfo.setLongitude(longitude);
        farmerLocationInfo.setLatitude(latitude);
        farmerLocationInfoMapper.updateByFarmerId(farmerLocationInfo);

        recordLoginInfo(loginUser.getUserId());
        // 生成token
        return tokenService.createToken(loginUser);
    }

    /**
     * 校验验证码
     *
     * @param username 用户名
     * @param code 验证码
     * @param uuid 唯一标识
     * @return 结果
     */
    public void validateCaptcha(String username, String code, String uuid) {
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        if (captchaEnabled) {
            String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
            String captcha = redisCache.getCacheObject(verifyKey);
            if (captcha == null) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(
                        username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.expire")
                ));
                throw new CaptchaExpireException();
            }
            redisCache.deleteObject(verifyKey);
            if (!code.equalsIgnoreCase(captcha)) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
                throw new CaptchaException();
            }
        }
    }

    /**
     * 登录前置校验
     * @param username 用户名
     * @param password 用户密码
     */
    public void loginPreCheck(String username, String password) {
        // 用户名或密码为空 错误
        if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("not.null")));
            throw new UserNotExistsException();
        }
        // 密码如果不在指定范围内 错误
        if (password.length() < UserConstants.PASSWORD_MIN_LENGTH
                || password.length() > UserConstants.PASSWORD_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // 用户名不在指定范围内 错误
        if (username.length() < UserConstants.USERNAME_MIN_LENGTH
                || username.length() > UserConstants.USERNAME_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // IP黑名单校验
        String blackStr = configService.selectConfigByKey("sys.login.blackIPList");
        if (IpUtils.isMatchedIp(blackStr, IpUtils.getIpAddr())) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("login.blocked")));
            throw new BlackListException();
        }
    }

    /**
     * 记录登录信息
     *
     * @param userId 用户ID
     */
    public void recordLoginInfo(Long userId) {
        userService.updateLoginInfo(userId, IpUtils.getIpAddr(), DateUtils.getNowDate());
    }

    /**
     * 手机号验证码登录
     * @param phoneNum 手机号
     * @param smsCode 短信验证码
     * @return 令牌
     */
    public String loginByPhone(String phoneNum, String smsCode) {
        // 验证手机号格式
        if (!PhoneUtils.isValidPhone(phoneNum)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(phoneNum, Constants.LOGIN_FAIL, "手机号格式不正确"));
            throw new ServiceException("手机号格式不正确");
        }

        // 验证短信验证码
        validateSmsCode(phoneNum, smsCode);

        // 根据手机号查询用户
        SysUser user = userService.selectUserByPhone(phoneNum);
        if (user == null) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(phoneNum, Constants.LOGIN_FAIL, MessageUtils.message("user.not.exists")));
            throw new UserNotExistsException();
        }

        // 检查用户状态
        checkUserStatus(user);

        // 记录登录信息
        AsyncManager.me().execute(AsyncFactory.recordLogininfor(phoneNum, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));
        recordLoginInfo(user.getUserId());

        // 创建LoginUser对象
        LoginUser loginUser = new LoginUser(user.getUserId(), user.getDeptId(), user, permissionService.getMenuPermission(user));

        // 生成token
        return tokenService.createToken(loginUser);
    }


    /**
     * 验证短信验证码
     */
    private void validateSmsCode(String phoneNum, String smsCode) {
        String verifyKey = CacheConstants.SMS_CODE_KEY + phoneNum;
        String cacheSmsCode = redisCache.getCacheObject(verifyKey);

        if (cacheSmsCode == null) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(phoneNum, Constants.LOGIN_FAIL, "短信验证码已过期"));
            throw new ServiceException("短信验证码已过期");
        }

        if (!smsCode.equals(cacheSmsCode)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(phoneNum, Constants.LOGIN_FAIL, "短信验证码不正确"));
            throw new ServiceException("短信验证码不正确");
        }

        // 验证成功后删除验证码
        redisCache.deleteObject(verifyKey);
    }

    /**
     * 检查用户状态
     */
    private void checkUserStatus(SysUser user) {
        if (UserStatus.DELETED.getCode().equals(user.getDelFlag())) {
//            log.info("登录用户：{} 已被删除.", user.getUserName());
            throw new ServiceException(MessageUtils.message("user.password.delete"));
        } else if (UserStatus.DISABLE.getCode().equals(user.getStatus())) {
//            log.info("登录用户：{} 已被停用.", user.getUserName());
            throw new ServiceException(MessageUtils.message("user.blocked"));
        }
    }

}
